linux-kernel - Re: Feedback on TCP: Make TCP_RTO

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Message-ID: <48561732.1040203@davidnewall.com>
Date:	Mon, 16 Jun 2008 17:03:06 +0930
From:	David Newall <davidn@...idnewall.com>
To:	Stephen Hemminger <shemminger@...tta.com>
CC:	OBATA Noboru <noboru.obata.ar@...achi.com>,
	"David S. Miller" <davem@...emloft.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-net@...r.kernel.org
Subject: Re: Feedback on TCP: Make TCP_RTO_MAX a variable

Stephen Hemminger wrote:
> On Mon, 16 Jun 2008 06:27:35 +0930
> David Newall <davidn@...idnewall.com> wrote:
>   
>> ... caused by floods of packets directed towards the internet
>> link at one end or the other
> Why are you letting them through. Use proper firewalling.
>   

They didn't get through the router.  These floods congested the border
links (devices).

> A real VPN with IPSEC would have stopped the problem.
>   

No, it wouldn't.  If you don't see this, ask and I'll explain, again.


> I wouldn't put a mission critical system exposed directly to the Internet.
>   

I didn't.  Standard NAT appliances protect all ends.
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